Select a network solid from the following substances?   A. NaCl(s)   B. S8(s)   C. MgO(s)   D. SiO2(s)   E. C25H52(s)

ANSWER QUESTION 5-19 – You need to try different orders of separation units. If you try only one order, then you need to justify why you didn’t try other orders of separation units. (I would highly recommend trying at least 3 combinations of order of separation units.)

D1.

I can’t figure out the correct number of sig figs

Using the following balance equations: 2Al + 6HCl --> 2AlCl3 + 3H2 If you have 576 grams of aluminum metal and react it with 459 grams of Hydrogen Chloride, how many moles of AlCl3 can you produce?

Which of the following electron configurations belongs to an atom that is most likely to be involved in an ionic bond? (A) 1s22s2p63s23p3 (B) 1s22s2p63s² (c) 1s²2s²2p°3s²3p6 (D 1s252p6

At a certain temperature the rate of this reaction is first order in N,O, with a rate constant of 0.166 s: 2N,0, (e) 2N,0, () +0, (g) Suppose a vessel contains N,0, at a concentration of 0.320 M. Calculate how long it takes for the concentration of N,0, to decrease to 0.0768 M. You may assume no other reaction is important. Round your answer to 2 significant digits.

Can someone tell me how each density for each compound was solved. I'm having trouble understanding how its solved if only the mole fraction and molecular weight were given along with a temperature and certain pressure.